Auditory processing disorder (also known as central auditory processing disorder or CAPD) is a condition that makes it hard for kids to recognize subtle differences between sounds in words. It affects their ability to process what other people are saying.
Gallium is a solid metal at room temperature, but it melts in your hands. 00:09. When gallium is in its liquid state, if feels like cold melted solder in your hands. 00:33. Melting gallium onto aluminum makes the aluminum brittle enough to break with your fingers.
Melting and Casting of Copper and Aluminum Alloys: Part One. Although copper is the metal that is longest used technologically by mankind and aluminum one of the shortest, in both industries a variety of melt treatments and sometimes similar technologies were investigated over time.